Improvement in cutting-tools for turning-lathes



E. BHSSKBPFF.

. matting Tools for Turning Lathes.

No. 134,313. Patented Dec-24,1872.

min'mssaes 7 Knvmmn 1* A M FHOTU-[ITHUGRA FHIC CQMY/OSBORNEZS PHDQESS)CHARLES RAHSSKOPFF, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN CUTTING-TOOLS FQR TURNING-=LATHES.

Specification forming part of Letters Patent No. 1134,3h3, datedDecember 24, 1872.

To all whom it may concern:

Be it known that I, CHARLES RAHSSKOPFF, of San Francisco city andcounty, State ofOalifornia, have invented an Improved Milling- Tool forTurning-Lathes; and I do hereby declare the following description andaccompanying drawing are sufficient to enable any person skilled in theart or science to which it most nearly appertains to make and use mysaid invention or improvement without further invention or experiment.

My invention relates to an improved tool to be used on turning-lathes inplace of the usual cutter or circular planer with a cutting-face formilling down or cutting a stem or rod of any required diameter from apiece of metal. My improvement consists of an arrangement by whichdetachable cutters or planers can be employed in place of the ordinaryfixed or permanent ones. These cutters are so arranged that they can beadjusted to or from the center, as desired, in order to cut or trim awider or narrower shoulder with a larger or smaller stem, as required.

In order to explain my invention so that others will be able tounderstand its construction and operation, reference is had to theaccompanying drawing forming a part of this specification, in which-Figure 1 is a front view 5 Fig. 2 is a back view; and Fig. 3 is an edgeview of the inner pair of disks.

Arepresents a circular plate or disk having a hollow stem, B, projectingfrom its center upon one side. The hole which passes through the stemalso passes through the center of the disk, and its edge on the face orouter side of the disk is beveled, as shown. Two or more angulargrooves, c c, are made in the face of the circular plate radially fromthe center to the periphery. D is a circular plate or disk, which isalso provided with a circular central opening, 0, and which has radialgrooves c c 0 upon one side, so that when the two disks are are securedtogether face to face by means of screws or other suitable device theradial grooves in the two plates or disks will l i e opposite eachother. The grooves in theouter disk or plate D are also angular, asshown,

so that the grooves in the two plates when thus brought together form arhomboidal recess from the center to the circumference of the uniteddisks. 6 e e are the cutters. These cutters are made to fit in therhomboidal recesses above mentioned, and are therefore so constructedthat a cross-section of either one at any point will give the figure ofa rhomboid. The inner ends of these cutters are beveled so as to presentas many cuttingpoints toward the center as there are cutters in thetool. A ring, F, which has an inward-projecting flange or shoulder, t,at one side, is then slipped over the outer rim of the two united disksuntil the projecting lugs or keys j on the back of the disk A passthrough corresponding recesses in the flange i, so as to lock the ringupon the disks by turning the lugs upon the outside of the flange whilethe united disks remain inside against it. Setscrews 70 70 it passthrough this outer ring opposite each of the recesses 00, by which thecutters e e 0 may be set to or from the center,

as desired, according to the width of shoulder and diameter of stem itis desired to cut.

This tool is to be used in place of the usual reamer or planer used bymetal-workers on a turning-lathe. The hollow stemB is to be secured inthe face-plate of the turning-lathe, and the piece of metal to be turnedis forced against the cutters e c 0 through the central opening in theouter disk. The position of these cutters in the tool causes them topresent a sharp cutting-edge to the shoulder and a sharp pointed edgefor turning the stem. The cutters can be set to or from the center, asdesired, by means of the screws 7c 70 is, and thus gage the diameter ofthe stem which it is desired to cut and the width of shoulder at thebase of the stem. The stem as it is cut passes into the hollow stem ofthe tool.

When the cutters become dull or broken they can readily be removed bytaking off the outer disk, and, after sharpening, be replaced again,thus providing a great advantage over the ordinary reamer or cutter,which is made with permanent teeth, which, when dulled or broken,require to be entirely remade by filing down the entire face.

Having thus described my invention, what i I claim, and desire to secureby Letters Patent, 1s

1. The disk A with its hollow stem B, and having its face provided withthe radial grooves c c, in combination with the circular plate or disk Dwith its central opening and corretheir radialoutters ee, the ringl'with its setspond'ng' radial grooves c u c, substantially screws la 70k, substantially as and for the as and for the purpose above described.purpose above described.

2. In combination with the two disks A D I In Witness whereof hereuntoset my hand with their central openings and corresponding and seal.radial grooves 0 c 0 and 0 c 0, the adjustable and removable cutters e ee, substantially as and for the purpose above described.

3. In combination with the disks A D with CHARLES RAHSSKOPFF. [L. s]Witnesses:

J. L. BOONE,

G. M. Rwx-mnnson.

